Xantrex Powerpack 300 Owner's Manual page 44

:
Note
The Battery Level LEDs are only accurate when the
XPower Powerpack has been disconnected from all appliances
and all charging sources for 15 minutes.
Important: •
• Do not leave the XPower Powerpack permanently connected
to the vehicle's lighter socket or 12 V accessory outlet.
• Do not solder or hard wire the DC charging cable from the
Powerpack to an external electrical system. The charging
cable is designed for temporary use only to recharge the
Powerpack battery.
Recharging the XPower Powerpack Battery
31